Web severing mechanism



tw. M. STOCKER ,2 7

- v WEB SEVERING mmczmmsu 2 111mm 10, 194; 2 sums-sheet 1 197' TURNE Y A 11. 1942. w. M. sTocK R 2292.123 WEB SEVERING MECHANISM ruea Dec. 10', 1941 2 sneaks-sheet 2 INVENTOR.

' imam #5100701 Patented Aug. 11, 1942 2,292,723 I WEB SEVEBING Mnonamsm William M. Stocker, Hollis, N. .Y., assignor to Cameron Machine Company, Brooklyn, 2. Y., a corporation of New York Application December 10, 1941, Serial No. 422,307 1 Claim. (01. 16461) The present invention relates generally to severing devices for webs of flexible material.

The so-called score-cut slitting device consists essentially of a smooth-face roller and a somewhat blunt severing member that is in knife-edge engagement with the smooth-face roller.- One form of score-cut slitting device consists of.a plurality of rotatable circular severing members coaxially mounted,.and a plurality of smooth-face .rollers to engage the severing members under spring or weight pressure. In

order to obtain uniform slitting it is highly desirable to compensate for variations in diameter of the severing members with respect to one another by individually adjusting the pressure of the smooth-face rollers. To do this it is necessary to mount each roller in a separate holder or lever and, when the sections orribbons to be produced are very narrow in width, say

-"of'an inch or less, it is diflicult tov obtain sufliciently sturdy holders or levers to go into the small space available, for it has'been found that, to adequately support a roller, a holder approximately inch in width is desirable;

The'main object and feature of this invention is to overcome the above dimculty.

In the accompanying drawings the invention is embodied in one concrete and preferred'form, in which:

Fig. 1' is a vertical sectional view, substantially on the plane of line l-l of Fig. 2, of a device embodying the invention;

Fig. 2 is a horizontal sectional view substantially on the plane of line 22 of Fig. 1:,

Fig. 3 is a. top plan view, looking tion of arrow 3 of Fig. 1; and

Fig. 4 is a bottom plan view, looking in the direction of arrow 4 of Fig. 1.

in the direc- II! indicates a plurality of rotatable circular severing members of the score-cut type, said members being coaxially mounted on driven shaft ll. Said severing members can be pinking l2 and I3 indicate two spaced-apart sets of rotatable smooth-face rollers to engage the severingmembers and the two sets of rollers,,which gmeans take the following form: it indicates a guide roll over which web I! is. led to pass in a substantially tangential path between the severing members and the first-set I! of smoothface rollers. Then the slitted web sections pass away from said severing member and first set of rollers i2 to' the'undersurface of guide roll [6, located intermediate the two sets of rollers I2 and I3, and upward in a substantially tangential path betweenthe severing members and the other set, l3, of the smooth-face rollers.

The twice slitted web sections then pass over guideroll I! to a winding or other receiving device. By the foregoing means the web is not carried around the periphery of the severing members when passing from the first to the second set of smooth-face rollers so that deleterious efi'ect of said severing'members upon said slitted sections, due t'odis'placement of the slitted'sectioris out of their own plane or otherwise, is avoided.

Itwill further be seen that ample space is provided for the' location of holders (to be presently described) to adequately support 'thesmooth-face rollers.

The holders or supporting means for the smooth-face rollers mayflof course, vary widely 1 in form and construction, but are, in thepresent instance, constructed as follows: l I 8 and I9 denote two cheek members that are secured together in spaced relationby-means of spacing blocks 20 and screws 2|. Said cheek members. are-provided with guide slots- 22 in which is slidingly mounted atwo-armed yoke 23 having recesses 24 at the upper ends of its arms for the reception of squared ends 25' of pintle 26' so that said pintle is non-rotatable.

Rotatably mounted on said'pintle, as by means of ball bearings, is a smooth-face roller 21. 28 indicates a spring. anchored on the holder and bearingagainst the lower slotted portion 29 .of

rollers with a scalloped severing edge if desired.

the. yoke to thereby. press said roller-27 against a severing member l0, and the pressure of said spring 28 can be regulated by means of screw ering members under pressure and to be rotated by frictional engagement therewith. Each set contains one-half the number of rollers required to ooact with the severing members, the rollers of the two'sets being staggered with respect to each other so that the rollers of one set will engage alternate severing members and the rollers of the other set will engage the other alternate severing members. Suitable means are provided to guide the web between the sev- {30. Theholder is clamped to a. supportingbar 3|; common toall the smooth-face rollers of a set, by means of screw 32, and said supporting bar 3| can be moved toward and away from sev ering members III in a well-understood manner.

I claim:

In a severing mechanism. forwebs offflexible material, a plurality of rotatable circular severing members coaxially mounted, two spaced-- apart sets of rotatable smooth-face rollers to engage the severing members under pressure,

each set containing one-half the number of rollers required to onset with the severing members, the rollers of the two sets being staggered with respect to each other so that the rollers of one set will engage alternate severing members I and the-rollers of the other set will engage the other alternate severing members, and means to guide a web between said severing'members and said two sets of rollersfincluding' a guide roll intermediate said two sets of rollers to guide the WILLIAM M. STOCKER. 

